21070698 has 24 divisors (see below), whose sum is σ = 46322304. Its totient is φ = 6384840.

The previous prime is 21070657. The next prime is 21070703. The reversal of 21070698 is 89607012.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13786 + ... + 15237.

It is an arithmetic number, because the mean of its divisors is an integer number (1930096).

Almost surely, 2^21070698 is an apocalyptic number.

21070698 is an abundant number, since it is smaller than the sum of its proper divisors (25251606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21070698 is a wasteful number, since it uses less digits than its factorization.

21070698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29050 (or 29039 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 21070698 is about 4590.2829978118. The cubic root of 21070698 is about 276.2016746955.

The spelling of 21070698 in words is "twenty-one million, seventy thousand, six hundred ninety-eight".